Process Groups

[klemens-morgenstern]

Synopsis:

bool this_process::is_grouped(); 

struct group
{
    group();
    void wait();
    void terminate();
    void detach();
    /**/ native_handle();
    void assign(child &);
};

Putting a process into another group:

group g;
execute("gcc", g);

Problem: the this_process::group() cannot be implemented in a proper way, since I cannot get the handle of the current process group on windows. BUT I can create a group and assign the current process to it, if it does NOT have a group assigned to it. The latter is also a windows constraint.

I.e. done like this:

group g;
auto c = execute("gcc");
g.assign(c);

That throws if this_process is already assigned to a group (windows constraint).

For Posix: this is done indirectly, a group will have a bool which says if it's initialized. If it is not initialized it will be after fork and write the gid into a self-pipe.

[klemens-morgenstern]

Does work.